Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d6cb67ebca4c6c…

MALICIOUS

PDF

33.2 KB Created: 2021-07-05 01:10:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 8b76c741b1e3f3854e32aa34691612f3 SHA-1: 99920ff49284dc81ae98ed8f87a980e0981ffc9c SHA-256: c2d6cb67ebca4c6c532cc302d360cc9bfa373484492252900dcb4aefa0d22c63
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/479516143/minecraft-survival-hacks-game-hack PDF link annotation
    • http://elibrary.perludem.org//repository/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/add-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-free-spin_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hacks-for-pet-ranch-roblox-for-free-coins_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/robux-download_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-any-account-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-promodes-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-driveblox-unlimited-money-cheat_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-speed-hack-with-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hack-peoples-accounts-oh-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-skins-free-download_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-alone-hack-script_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-games-for-free-for-kids_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-cards-by-doing_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBD 21704 bytes
SHA-256: 8304b8efdecec1ad166712c4fd3e6332b28d60aa8ec0d1c42fc6c9d106340b5d
font_01_sfnt_off00005ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE1 18356 bytes
SHA-256: 3f8c07b70f743712d3b4317b18b553f1a7ae77b3390c9655d2aa42ba9c2140cb

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